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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.ws.commons.schema.extensions;

import java.util.HashMap;
import java.util.Map;

import javax.xml.namespace.QName;

import org.w3c.dom.Node;

import org.apache.ws.commons.schema.XmlSchemaObject;
import org.apache.ws.commons.schema.constants.Constants;

/**
 * Default deserializer. The action taken when there is nothing specific to be done would be to attach the raw
 * element object as it is to the meta information map for an element or the raw attribute object
 */
public class DefaultExtensionDeserializer implements ExtensionDeserializer {

    /**
     * deserialize the given element
     * 
     * @param schemaObject - Parent schema element
     * @param name - the QName of the element/attribute to be deserialized. in the case where a deserializer
     *            is used to handle multiple elements/attributes this may be useful to determine the correct
     *            deserialization
     * @param node - the raw DOM Node read from the source. This will be the extension element itself if for
     *            an element or the extension attribute object if it is an attribute
     */
    @SuppressWarnings("unchecked")
    public void deserialize(XmlSchemaObject schemaObject, QName name, Node node) {

        // we just attach the raw node either to the meta map of
        // elements or the attributes

        Map metaInfoMap = schemaObject.getMetaInfoMap();
        if (metaInfoMap == null) {
            metaInfoMap = new HashMap();
        }

        if (node.getNodeType() == Node.ATTRIBUTE_NODE) {

            Map attribMap;
            if (metaInfoMap.containsKey(Constants.MetaDataConstants.EXTERNAL_ATTRIBUTES)) {
                attribMap = (Map)
                    metaInfoMap.get(Constants.MetaDataConstants.EXTERNAL_ATTRIBUTES);
            } else {
                attribMap = new HashMap();
                metaInfoMap.put(Constants.MetaDataConstants.EXTERNAL_ATTRIBUTES, attribMap);
            }
            attribMap.put(name, node);

        } else if (node.getNodeType() == Node.ELEMENT_NODE) {
            Map elementMap;
            if (metaInfoMap.containsKey(Constants.MetaDataConstants.EXTERNAL_ELEMENTS)) {
                elementMap = (Map)metaInfoMap.get(Constants.MetaDataConstants.EXTERNAL_ELEMENTS);
            } else {
                elementMap = new HashMap();
                metaInfoMap.put(Constants.MetaDataConstants.EXTERNAL_ELEMENTS, elementMap);
            }
            elementMap.put(name, node);
        }

        // subsequent processing takes place only if this map is not empty
        if (!metaInfoMap.isEmpty()) {
            Map metaInfoMapFromSchemaElement = schemaObject.getMetaInfoMap();
            if (metaInfoMapFromSchemaElement == null) {
                schemaObject.setMetaInfoMap(metaInfoMap);
            } else {
                metaInfoMapFromSchemaElement.putAll(metaInfoMap);
            }

        }

    }
}